I think we have had one under so far in the entire tournament, and the odds are still above even money. Why i think this is a good bet is because in Zambias case, they have been playing some really good football in 2009.
They got a 1-1 draw in Cairo, and were unlucky against Algeria. In friendlies recently, Zambia scored 4 against both North and South Korea and while they have no big stars in European Football, they have shown they can score plenty of goals as a unit. However, i expect goals from Tunisia, who missed out on the world cup and have been attacked at home by fans and the media for poor performances. I think we can expect a high scoring game that will go over 2.5 goals.
Pick: Half Unit on Over 2.5 Goals, 2.34 @ BetFair (not counting commish)